How to modify and use the TWIST camac minidaq system

1. To modify the histogram filling

From the twistonl account on midtwist, type "cd
~/online/analyzer", then use your favorite editor to edit the
file adchist.c.

So far, the program knows about the first 4 stop inputs (0-3) of
the TDC and the first 4 inputs (0-3) of the ADC. At present, TDC0
contains the TCAP(RF) signal and TDC1 contains the machine RF
signal, divided by two in each case to result two 43 ns periods
in each distribution. TDC2 and TDC3 are unused. ADC0-ADC3 contain
S1 to S4 analogue signals respectively. This will likely have
changed by the time you read this note (see elogs), but it serves
the purpose for now.

There are calls for HBOOK1 and HBOOK2 to define histograms in
adc_hist_init. Add to or modify those to satisfy your craving for
online information.

The tdc and adc channels are stored in floating variables t0-t3
and a0-a3 in the routine adc_hist, in a loop. You can manipulate
these, assuming you add definitions for any variables. You can
add a call to HF1 or HF2 as shown to fill the histograms you've
defined, with whichever variable you wish.

When it looks good, save the file and run "make" from the
directory. This creates the executable file named "analyzer".

2. To start the analyzer

From ~/online/analyzer, type "analyzer" to run the analyzer on
current data. See the readme.txt file in that directory to find
out how to run it on saved files (not tested...).

3. To look at results

Start up paw by typing "paw++", then on the command window type
"global_sect ONLN", followed by "Cdir \\ONLN". The group ONLN
should appear in the other paw window. Double click to see your
histograms and ntuples by number. Double click the icons to
display the histograms. You probably know paw better than I do,
so I'll quit here...